6 Measurement Acetylacetone Colorimetric MethodStock HCHO solution = 37.7 % (m/m), ρ = g/mLRequire HCHO std. (1000 ppm), how much of the 37.7 % solution should be taken to make a 100 mL solution of 1000 ppm HCHO?Dilutions of 1000 ppm to make a 1,2, and 5 standard?1:100 to make a 10 ppm std., then 1:10, 2:10 and 1:2

7 Measurement Acetylacetone Colorimetric MethodMeasure out 2x 25 mL of absorption liquid (DI water) into 2 impingers (sample and equipment blank)Pass air through one of the impingers at 1 L/min for 40 minutesPerform the following to: a 5 mL reagent blank, a 5 mL 1000 ppm Std., 5 mL of the air sample and the sample blankAdd 5 mL acetlyacetone reagent and 5 mL DI waterHeat for 30 mins at 40 °CLeave for color developemnt (30 mins)Dilute the standard to 1, 2, and 5 ppmRead standards and sample tubes at 412 nm, slit width 2.0 nm